spring 上传下载

/*
* package com.jygps.common.web; import java.io.File; import
* java.io.FileInputStream; import java.io.FileNotFoundException; import
* java.io.IOException; import java.io.InputStream; import java.io.OutputStream;
* import java.text.SimpleDateFormat; import java.util.Date; import
* java.util.Iterator; import javax.servlet.http.HttpServletRequest; import
* javax.servlet.http.HttpServletResponse; import org.slf4j.Logger; import
* org.slf4j.LoggerFactory; import org.springframework.stereotype.Controller;
* import org.springframework.web.bind.annotation.RequestMapping; import
* org.springframework.web.multipart.MultipartFile; import
* org.springframework.web.multipart.MultipartHttpServletRequest; import
* org.springframework.web.multipart.commons.CommonsMultipartResolver; import
* com.jygps.common.util.Result; import com.jygps.common.util.StringUtil;
* @Controller
* @RequestMapping("/fileUploadController") public class FileUploadController
* extends BaseMultiActionController { Logger logger =
* LoggerFactory.getLogger(FileUploadController.class);
* @RequestMapping("/upload.do") public Result<?> upload(HttpServletRequest
* request, HttpServletResponse response) throws IOException {
* CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(
* request.getSession().getServletContext()); String imgAddress = ""; if
* (multipartResolver.isMultipart(request)){ MultipartHttpServletRequest
* multiRequest = (MultipartHttpServletRequest) request; Iterator<String> iter =
* multiRequest.getFileNames(); while (iter.hasNext()){ MultipartFile file =
* multiRequest.getFile((String) iter.next()); if (file != null){ String
* fileName = file.getOriginalFilename(); String path1 =
* Thread.currentThread().getContextClassLoader().getResource("").getPath() +
* File.separator; // 下面的加的日期是为了防止上传的名字一样 fileName = new
* SimpleDateFormat("yyyyMMddHHmmss").format(new Date()) + fileName; String path
* = path1 + fileName; File localFile = new File(path);
* if(StringUtil.isBlank(imgAddress)){ imgAddress += fileName; }else{ imgAddress
* = imgAddress + "," + fileName; } file.transferTo(localFile); } }
* request.getSession().setAttribute("imgAddress", imgAddress); } return
* Result.success(imgAddress); }
* @RequestMapping("/toUpload.do") public String toUpload() { return "upload"; }
* @RequestMapping("/download") public String download(String fileName,
* HttpServletRequest request, HttpServletResponse response) {
* response.setCharacterEncoding("utf-8");
* response.setContentType("multipart/form-data");
* response.setHeader("Content-Disposition", "attachment;fileName=" + fileName);
* try{ String path =
* Thread.currentThread().getContextClassLoader().getResource("").getPath();//
* 这个download目录为啥建立在classes下的 path = path.substring(1); InputStream inputStream
* = new FileInputStream(new File(path + File.separator + fileName));
* OutputStream os = response.getOutputStream(); byte[] b = new byte[2048]; int
* length; while ((length = inputStream.read(b)) > 0){ os.write(b, 0, length); }
* // 关闭。 os.close(); inputStream.close(); } catch (FileNotFoundException e){
* e.printStackTrace(); } catch (IOException e){ e.printStackTrace(); } //
* 返回值要注意，要不然就出现下面这句错误！ // java+getOutputStream() has already been called for
* this response return null; } }
*/

package com.jygps.common.web;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.BindException;
import java.util.ArrayList;

import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
import org.springframework.web.servlet.ModelAndView;

/**
* *********************************
* @ClassName: FileUploadController.java
* @Description: 文件上传/
* @author: zenghang
* @createdAt: 2016年4月6日下午2:12:23
**********************************
*/
@Controller
public class FileUploadController {

@RequestMapping(value = "/upload", method = RequestMethod.POST)
public ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, BindException errors)
throws Exception {

MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest.getFile("file");

String name = multipartRequest.getParameter("name");
System.out.println("name: " + name);
// 获得文件名：
String realFileName = file.getOriginalFilename();
System.out.println("获得文件名：" + realFileName);
// 获取路径
String ctxPath = request.getSession().getServletContext().getRealPath("/") + "images/";
// 创建文件
File dirPath = new File(ctxPath);
if (!dirPath.exists()){
dirPath.mkdir();
}
File uploadFile = new File(ctxPath + realFileName);
FileCopyUtils.copy(file.getBytes(), uploadFile);
request.setAttribute("files", loadFiles(request));
return new ModelAndView("success");
}

@RequestMapping(value = "/upload2", method = RequestMethod.POST)
public ModelAndView onSubmit2(HttpServletRequest request, HttpServletResponse response, BindException errors)
throws Exception {

// 转型为MultipartHttpRequest
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
// 根据前台的name名称得到上传的文件
MultipartFile file = multipartRequest.getFile("file");
// 获得文件名：
String realFileName = file.getOriginalFilename();
// 获取路径
String ctxPath = request.getSession().getServletContext().getRealPath("/") + "\\" + "images\\";
// 创建文件
File dirPath = new File(ctxPath);
if (!dirPath.exists()){
dirPath.mkdir();
}
File uploadFile = new File(ctxPath + realFileName);
FileCopyUtils.copy(file.getBytes(), uploadFile);
request.setAttribute("files", loadFiles(request));
return new ModelAndView("success");
}

@RequestMapping(value = "/upload3", method = RequestMethod.POST)
public String upload(@RequestParam("file") MultipartFile image, HttpServletRequest request) throws IOException {

String ctxPath = request.getSession().getServletContext().getRealPath("/") + "\\" + "images\\";
System.out.println("路径：" + ctxPath);
File file = new File(ctxPath + "/" + image.getOriginalFilename());
// FileCopyUtils.copy(image.getBytes(),new
// File(ctxPath+"/"+image.getOriginalFilename()));
try{
image.transferTo(file); // 保存上传的文件
}
catch (IllegalStateException e){
e.printStackTrace();
}
catch (IOException e){
e.printStackTrace();
}
request.setAttribute("files", loadFiles(request));
return "success";
}

// 多文件上传
@RequestMapping(value = "/upload4", method = RequestMethod.POST)
public List<String> fileUpload(HttpServletRequest request, HttpServletResponse response, BindException errors)
throws Exception {

MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
String ctxPath = request.getSession().getServletContext().getRealPath("/") + "\\" + "images\\";

File file = new File(ctxPath);
if (!file.exists()){
file.mkdir();
}
String fileName = null;
for (Map.Entry<String, MultipartFile> entity : fileMap.entrySet()){
// 上传文件名
// System.out.println("key: " + entity.getKey());
MultipartFile mf = entity.getValue();
fileName = mf.getOriginalFilename();
File uploadFile = new File(ctxPath + fileName);
FileCopyUtils.copy(mf.getBytes(), uploadFile);
}
List<String> files = loadFiles(request);
request.setAttribute("files", files);
return files;
}

// @ModelAttribute("files")//此属性用于初始类时调用,但上传文件后不能时时反应上传文件个数,不适合动态数据
public List<String> loadFiles(HttpServletRequest request) {
List<String> files = new ArrayList<String>();
String ctxPath = request.getSession().getServletContext().getRealPath("/") + "\\" + "images\\";
File file = new File(ctxPath);
if (file.exists()){
File[] fs = file.listFiles();
String fname = null;
for (File f : fs){
fname = f.getName();
if (f.isFile()){
files.add(fname);
}
}
}
return files;
}

@RequestMapping("/download/{fileName}")
public ModelAndView download(@PathVariable("fileName") String fileName, HttpServletRequest request,
HttpServletResponse response) throws Exception {

response.setContentType("text/html;charset=utf-8");
request.setCharacterEncoding("UTF-8");
java.io.BufferedInputStream bis = null;
java.io.BufferedOutputStream bos = null;

String ctxPath = request.getSession().getServletContext().getRealPath("/") + "\\" + "images\\";
String downLoadPath = ctxPath + fileName;
System.out.println(downLoadPath);
try{
long fileLength = new File(downLoadPath).length();
response.setContentType("application/x-msdownload;");
response.setHeader("Content-disposition", "attachment; filename="
+ new String(fileName.getBytes("utf-8"), "ISO8859-1"));
response.setHeader("Content-Length", String.valueOf(fileLength));
bis = new BufferedInputStream(new FileInputStream(downLoadPath));
bos = new BufferedOutputStream(response.getOutputStream());
byte[] buff = new byte[2048];
int bytesRead;
while (-1 != (bytesRead = bis.read(buff, 0, buff.length))){
bos.write(buff, 0, bytesRead);
}
}
catch (Exception e){
e.printStackTrace();
}
finally{
if (bis != null)
bis.close();
if (bos != null)
bos.close();
}
return null;
}
}

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<%@ include file="/resource/common/baseTagLibs.jsp"%>
<script type="text/javascript" src="${ctx }/resource/js/tools/jquery-1.9.1.min.js" type="text/javascript"></script>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
i = 1;
j = 1;
$(document).ready(function(){

$("#btn_add1").click(function(){
document.getElementById("newUpload1").innerHTML+='<div id="div_'+i+'"><input  name="file" type="file"  /><input type="button" value="删除"  onclick="del_1('+i+')"/></div>';
i = i + 1;
});

$("#btn_add2").click(function(){
document.getElementById("newUpload2").innerHTML+='<div id="div_'+j+'"><input  name="file_'+j+'" type="file"  /><input type="button" value="删除"  onclick="del_2('+j+')"/></div>';
j = j + 1;
});
});

function del_1(o){
document.getElementById("newUpload1").removeChild(document.getElementById("div_"+o));
}

function del_2(o){
document.getElementById("newUpload2").removeChild(document.getElementById("div_"+o));
}

</script>
</head>
<body>

<h1>springMVC字节流输入上传文件</h1>
<form name="userForm1" action="/springMVC7/file/upload" enctype="multipart/form-data" method="post">
<div id="newUpload1">
<input type="file" name="file">
</div>

<input type="button" id="btn_add1" value="增加一行" >
<input type="submit" value="上传" >
</form>
<br>
<br>
<hr align="left" width="60%" color="#FF0000" size="3">
<br>
<br>
<h1>springMVC包装类上传文件</h1>
<form name="userForm2" action="/springMVC7/file/upload2" enctype="multipart/form-data" method="post"">
<div id="newUpload2">
<input type="file" name="file">
</div>
<input type="button" id="btn_add2" value="增加一行" >
<input type="submit" value="上传" >

</form>
</body>
</html>